Teppei's brother Kotaro is a scientific genius and is kidnapped by the Machine Empire. Teppei gives chase and ends up in the Area of the Machine Empire! He is attacked by the B't Madonna and her donor Metal Face. Badly injured and bleeding everywhere, Teppei fights back, but he's no match for the B't Madonna! However, Teppei's blood reactivates X, whose body had been buried in the scrap pile. Once again active, X breaks free of the scrap, while Madonna has to take her donor Metal Face back to the Machine Empire for treatment. He had been seriously injured by Teppei just moments earlier. Meanwhile, Kotaro awakens in the Machine Empire. Major Aramis tells him about the Area and the B't's. She also starts to explain about the ultimate B't - Raphael. Asked to join them, Kotaro turns them down. He has faith in his brother and knows Teppei will be coming to save him! Episode summary graciously provided by Vortex Fansubs

Teppei thinks he has gained Karen's powerful partner X, as an ally! He soon learns differently. Not long after Metal Face and his B't Madonna leave, X and Teppei are attacked by the Fifth Unit Ryukon Troops. Can Teppei and X overcome their problems and work together to defeat the Fifth Unit???Vortex Fansubs

X's original donor is Karen and he'll obey only her! He's going to do everything he can to get rid of Teppei and go to find Karen! Teppei finally realizes that X isn't just a robot and gives up - telling X where he can find Karen. He then proceeds back into the Area alone and is soon attacked by the Ryukon Troops. Can Teppei defeat all of them by himself or will X return to help him???Episode summary graciously provided by Vortex Fansubs

X is finally willing to cooperate with Teppei. Suddenly, one of the best fighters in the Machine Empire appears before them! Fou Rafine, and his B't Je'taime! Je'taime's sonic attack is called the Deadly Carol. X and Teppei have never been up against fighters as strong as these two!Episode summary graciously provided by Vortex Fansubs

When Teppei comes around after his last battle, he finds himself being treated in Fou's chapel! X, however, has been deactivated and is lying motionless... One of the Machine Empire's hit men, Kaas, shows up and takes some of the children hostage to use against Fou. Je'taime, Fou, and Teppei and X must work together to stop the soldiers from getting away and reporting back to the Empire!Episode summary graciously provided by Vortex Fansubs

Teppei and X finally make it to the first point! Here, they meet a huge robot named Big Rock who is piloted by a young boy named Gaku. The robot doesn't last long against X and that's when the true guardian for this point shows up! This point is guarded by a B't named Groupie that can eat ANYTHING!! Humans, robots, tanks....you name it! His donor is Captain Hook. Captain Hook feeds Gaku to his B't and Teppei and X allow themselves to be eaten also, so they can rescue the boy! Will they get out alive?????Episode summary graciously provided by Vortex Fansubs

X and Teppei thought that Captain Hook and his B't had been defeated! But he hadn't!!! Captain Hook gives them a taste of his weapon, the Hanging Rod and just about fries them. His B't Groupie revives also and comes back to try and eat them again. X is damaged, but he and Teppei must still overcome these two again if they're going to continue into the Area!Episode summary graciously provided by Vortex Fansubs

Gaku has been poisoned by the ""Heavy Steam"" given off by Groupie. X and Teppei must rush to the next point, where an oasis can be found. They have to wash the poison off of Gaku and themselves! One BIG problem though! This oasis is protected by the illusionist Kamiura and his B't Mirage. Without even knowing that they were already caught in his illusion, X and Teppei start to fight each other...Episode summary graciously provided by Vortex Fansubs

Teppei and X break free from the illusion! X goes after the B't Mirage and Teppei goes after Kamiura. Both of them have already been affected by the Evil Flower pollen. Kamiura attacks Teppei by using illusions and Teppei has to break free from yet another trap before he can defeat Kamiura! X has to shut down all of his senses to attack Mirage and they have a serious battle... Episode summary graciously provided by Vortex Fansubs

X and Teppei are attacked by the B't Madonna and Metal Face. They force X and Teppei to crash into a deadly valley. It's a place where the sound of the wind can affect a B't and shatter them completely!! But, there was a man who came and helped them. He is Professor Zaji and he's wanted by the Machine Empire. To escape from the valley and rescue the Professor, X and Teppei must be united to overcome the effects of the wind! Episode summary graciously provided by Vortex Fansubs

Without warning, B't Raido appeared in front of Teppei and X! His donor is one of the greatest fighters in the Machine Empire. His name is Ron. Teppei and X have never fought anyone as tough as Ron before! He has the power of one of the Spirit Generals! Episode summary graciously provided by Vortex Fansubs

Teppei and X continue on their journey into the Area. They meet a mysterious old man named Kaos... Kaos and his B't Lamu used to be legendary warriors for the Machine Empire! X and Teppei must struggle to stay alive as Kaos and Lamu attack them! Episode summary graciously provided by Vortex Fansubs

B't Lamu and the warrior Kaos are very good! Kaos attacks and cuts Teppei through his Battle Gear! Teppei and X will win though, no matter what it takes! They'll become the best of buddies! Episode summary graciously provided by Vortex Fansubs

Teppei and X arrive at the next point and find themselves in a huge graveyard. In the middle of the graveyard is a giant tree full of skeletons! They meet a girl named Maria, who is terrified of something evil that lives there! Can Teppei and X help Maria and defeat this point's guardian??? Episode summary graciously provided by Vortex Fansubs

X has received a lot of damage from the Reaper! Teppei and X are in serious trouble! They must become united to save themselves from total destruction and fulfill Maria's dreams! Episode summary graciously provided by Vortex Fansubs

Teppei and X are finally united! X has revived his Prism of Aura and they have defeated the Reaper. X is still terribly damaged from the battle though, and now another enemy shows up in front of them! X might die... Episode summary graciously provided by Vortex Fansubs

X is trying to fly Teppei as close to the Area as possible before he dies. Now another of the Machine Empire's hit men shows up to attack them! His name is Rai of the Dark Knights. When Teppei and X fight back with the Prism of Aura, Shadow X appears!Episode summary graciously provided by Vortex Fansubs

Kotaro struggle to figure out a way to destroy Raphael! If Raphael keeps metamorphasizing, he'll absorb the entire planet! Kotaro has to figure out WHAT Raphael is and keep from being killed by his jailer in UnderHell! Meanwhile, Fou, must battle one of the Dark Knights to save Karin!Episode summary graciously provided by Vortex Fansubs

X is dying, and now the strongest of the Dark Knights, Mira, shows up to stop them! Teppei fights back with his Messiah Fist to try and keep X out of it, but X wants no part of it and attacks on his own. Only united do they stand a chance, and Teppei rejoins X. They use the Prism of Aura at full power and stop Mira, but it uses everything X has left.... Episode summary graciously provided by Vortex Fansubs

When Teppei comes to after the last battle, he finds X in pieces in front of him! Someone has dismantled him!!! He finds out that he's been rescued (or has he??) by Hokuto and B't Max - one of the legendary Spirit Knights of the Machine Empire! What will Teppei do without X? Episode summary graciously provided by Vortex Fansubs

Hokuto has indeed rescued Teppei AND X! B't Max rebuilt X into the Neo B't X!! Bigger, badder, and better than ever! X and Teppei were flying away from B't Max when they were attacked again, this time by Balzac and his B't Savanna. Teppei and X are much more powerful than before and this enemy is no match for the Neo B't X! Episode summary graciously provided by Vortex Fansubs

Teppei and X meet up with Fou and Je'taime and Hokuto and B't Max again. Teppei and X have to battle their way into the Machine Empire. These enemies are so strong, it's unbelievable!! They have to make it though, if they're going to get into the Area and rescue Kotaro! Episode summary graciously provided by Vortex Fansubs

It seems like an endless fight to destroy the B't Lalaynya and her donor Myslim! No matter what X and Teppei do, she regenerates and comes after them again! It's been a very hard battle... Can X and Teppei defeat this evil Knight??? Episode summary graciously provided by Vortex Fansubs

Teppei and X find out that they have defeated Lalaynya, but not Myslim! Myslim counterattacks with his Cyber Whip and hits Teppei! The poison causes Teppei to go blind. Teppei has to trust X completely and X responds by creating a new counterattack:Shining Wings! Episode summary graciously provided by Vortex Fansubs

Hokuto and Fou are on their way into the Area to clear up some doubts about the Machine Empire. X and Teppei are also trying to go to the Area, but Ron of the East tries to stop them all! He asked to Teppei to prove he has a piece of the sun and attacks! For everyone hoping for a conclusion to the story, give up that thought. This story is UNFINISHED and takes up exactly where this episode stops in Neo B't X- the OAV series!!! Episode summary graciously provided by Vortex Fansubs

Aramis warns Misha about Raphael's impending threat to destroy the Machine Empire, but her warnings are dismissed, and command of her troops is transferred to Juggler. Meanwhile, Karen discovers that a ball of light has landed near her and Teppei's hideout on Kamui Island, and her B't Shadow ventures out on its own. As Teppei, Fou, and Hokuto approach The Area, they arrive at the ruins of Fou's hometown, Sodom. There, they encounter Quatro, one of the Seven Evil Knights and a former friend of Fou's. Fou decides to stay behind, and Teppei learns that their enmity arose from Fou allegedly killing Quatro's little sister. Teppei faces an attack from Ryukan soldiers under Juggler's control and realizes they are being used as sacrifices. He frees them from Juggler's influence and learns that Fou has surrendered to Quatro. Determined to save Fou, Teppei heads back to Sodom.

In a flashback to Fou's troubled childhood in the war-torn Sodom, he rejects the teachings of the church where Lily and Quattro tried to befriend him. During a raid, the church is bombed, leaving Lily on the brink of death. Quattro asks Fou to give her hope, but Fou's skepticism prevails, and Lily dies. In the present, Quattro relentlessly attacks Fou, who won't fight back due to guilt. Teppei steps in but realizes Quattro's immense strength. Quattro seriously injures Je t'aime and engulfs Fou and Je t'aime in a fiery attack.

In a flashback, Lily is buried on a hill on the outskirts of Sodom. As Quattro vents his anger on Fou, Machine Empire soldiers bomb what's left of the city, taking the unconscious boys to become future soldiers. In the present, Fou survives Quattro's attack thanks to Je t'aime's sacrifice. Teppei condemns Quattro's vengeance, claiming he's blaming Fou for his sister's death. Quattro easily incapacitates Teppei but Fou decides to win to uncover the Machine Emperor's intentions. When Fou plays a funeral hymn on his violin after seeing Je t'aime's ashes, he unexpectedly starts playing the song of the angels, resurrecting Je t'aime as a "true phoenix." They defeat Quattro with a powerful attack called Fortune Symphonic, connecting with him psychologically. Quattro, on the verge of death, asks Fou to kill him, but Fou refuses, burying him beside Lily.

As Teppei and X journey towards The Area, they're pursued by the repaired and enhanced Metal Face and Madonna. They stumble into a trap zone that attacks intruders, but Shadow X, who appears damaged, intervenes to protect Teppei from Metal Face's ambush. Afterward, they examine Shadow in Hokuto's lab and discover she was handmade outside the Machine Empire. They find a clue linking Shadow to Kamui Island and Karen. After enhancing Shadow's systems to enable communication, they learn she refers to X as her "big brother." X instructs Shadow to return to Kamui Island and protect Karen while they proceed to The Area. Metal Face eventually confronts Teppei and X again, but Teppei's Shining Knuckle easily overpowers him. Teppei emphasizes the importance of relying on one's inner strength rather than machines, and X conveys to Madonna that B'ts have their own hearts and decisions. As they leave, Metal Face vows revenge against Teppei.

Teppei and X are attacked not long after leaving Metal Face. Arrows are appearing from out of nowhere! Then Ron and Raido, Fou and Je'taime, and Hokuto and Max show up and start attacking them! Or are they...? ^___^ Evil Meimu and his B't Halloween are masters of the nightmare. They have already started working on Teppei and X! Just as the fight between them is getting started, Metal Face and his B't Madonna show up again! Metal Face starts screaming that HE is the only one who is going to kill Teppei. He needs it and he wants it. (Told ya, he was obsessed!) Meimu is annoyed and attacks Metal Face and Madonna and Teppei and X end up rescuing them from Meimu!! Madonna is fatally injured in the battle and crash lands. Meimu attacks Teppei with his ""Final der Mogliche"" and his B't Halloween sends him into the ultimate nightmare of ""Dark Inferno""! Are Teppei and X going to be able to win this one?! Episode summary graciously provided by Vortex Fansubs

Teppei wakes up in a nightmare... Meimu tells him that if he wants to escape, he must defeat the monster. Yet, every time he defeats the monster, it comes back stronger! What can he do? The damage he is taking is affecting his real body and he'll soon die if he doesn't escape! Meanwhile, Halloween has attacked X and he is now injured and lying helpless on the ground. After many attacks, it appears that Meimu has won. Teppei is not able to defeat the monster... As he's dying, he hears X... X is calling for him! X offers his life so that Teppei can burn his Piece of the Sun and break free. Teppei says NEVER AGAIN! He has only his life left and that's the one he'll use. As Meimu's monster comes in to finish him, Teppei ""powers up!"". The monster doesn't stand a chance and is blown away by Teppei's brilliance, which destroys the Dark Inferno. X catches Teppei as he falls and Halloween attacks them! Teppei is still unconscious, so there's not a lot X can do. Madonna gathers h